How can I import a rigged model(Facial controls included) from SFM to blender?
Try exporting it from the external application into a format Blender supports such as:
.dae
.abc
.fbx
.bvh
.ply
.obj
.stl
.svg
.glb/.gltf

Then in Blender: Go to File, Import - select the matching format, locate &amp; import the file.